EP2613328B1 - Film électroconducteur transparent, dispositif de saisie d'informations et appareil électronique - Google Patents

Film électroconducteur transparent, dispositif de saisie d'informations et appareil électronique Download PDF

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Publication number
EP2613328B1
EP2613328B1 EP11859528.9A EP11859528A EP2613328B1 EP 2613328 B1 EP2613328 B1 EP 2613328B1 EP 11859528 A EP11859528 A EP 11859528A EP 2613328 B1 EP2613328 B1 EP 2613328B1
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Prior art keywords
conductive film
transparent conductive
colored compound
film
group
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German (de)
English (en)
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EP2613328A4 (fr
EP2613328A1 (fr
Inventor
Ryosuke IWATA
Mikihisa Mizuno
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Dexerials Corp
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Dexerials Corp
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/24—Electrically-conducting paints
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/04—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of carbon-silicon compounds, carbon or silicon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/32—Filling or coating with impervious material
    • H01B13/322—Filling or coating with impervious material the material being a liquid, jelly-like or viscous substance
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/36—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes
    • H01L33/40—Materials therefor
    • H01L33/42—Transparent materials
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/81—Anodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • H10K50/828—Transparent cathodes, e.g. comprising thin metal layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/805—Electrodes
    • H10K59/8051—Anodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/805—Electrodes
    • H10K59/8052—Cathodes
    • H10K59/80524—Transparent cathodes, e.g. comprising thin metal layers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/331—Nanoparticles used in non-emissive layers, e.g. in packaging layer

Definitions

  • the present disclosure relates to a transparent conductive film, an information input device, and an electronic device, and in particular, to a transparent conductive film using metal nanowires as a conductive material, an information input device using the transparent conductive film, and an electronic device provided with the transparent conductive film on a display panel thereof.
  • a metallic oxide such as an indium tin oxide (ITO) has been used in a transparent conductive film in which light transmittance is required.
  • a transparent conductive film examples include a transparent conductive film provided on a display surface side of a display panel, and furthermore a transparent conductive film of an information input device arranged on the display surface side of the display panel.
  • the transparent conductive film using a metal oxide is formed by sputtering in a vacuum environment, thereby increasing manufacturing cost.
  • crack and delamination have been likely to occur due to deformation such as bending and distortion.
  • a transparent conductive film using a metal nanowire which can be formed by coating or printing and also has a high resistance to bending and distortion, is considered.
  • the transparent conductive film using a metal nanowire has also attracted attention as a next-generation transparent conductive film without using indium being a rare metal (for example, see Patent Literatures 1 and 2 and Non-Patent Literature 1 below).
  • a gold nanotube using gold (Au) on which diffused reflection is unlikely to occur has been proposed.
  • the gold nanotube is formed by first using as a template a silver nanowire which is likely to reflect light diffusely, and then performing gold plating on the silver nanowire. Thereafter, a silver nanowire portion used as a template is subjected to etching or oxidation, thereby allowing it to be converted into a gold nanotube (see, for example, Patent Literature 3 described below).
  • Patent Literature 2 a method of preventing light scattering by using a metal nanowire and a secondary conductive medium (such as a CNT (carbon nanotube), a conductive polymer, and an ITO) in combination has been proposed (see, for example, Patent Literature 2 described below).
  • a metal nanowire and a secondary conductive medium such as a CNT (carbon nanotube), a conductive polymer, and an ITO
  • Non-Patent Literature 1 " ACS Nano” 2010, Vol. 4, No. 5, p.2955-2963
  • Document XP 020124407 “Functionalised Silver Nanowire Structures” relates to a study about functionalised silver nanowire structures.
  • the study discloses to fabricate extremely high aspect ratio silver nanowire structures by using a low-temperature solution technique and to functionalise these nanowire structures with fluorescent molecules.
  • the functionalisation can be carried out by adsorbing MEH-PPV onto the wires.
  • Document EP 2 615 528 A1 was published after the filing date of this document and relates to a transparent conductive element including a base having a first surface and a second surface, and a transparent electrode pattern part and a transparent insulating pattern part formed on at least one of the first surface and the second surface.
  • the transparent electrode pattern part and the transparent insulating pattern part are laid alternately on a base surface.
  • Plural pore portions are randomly formed apart in the transparent electrode pattern part and plural island portions are randomly formed apart in the transparent insulating pattern part.
  • the gold nanotube obtained by the former method not only the silver nanowire used as a template is wasted as a material, but also the metal material for performing gold plating is necessary. This increases material cost, and also manufacturing cost due to complicated processes.
  • an object of the present disclosure is to provide a transparent conductive film capable of preventing diffused reflection of light on the surface of the metal nanowire while inhibiting increase of cost by using a metal material without waste.
  • Another object of the present disclosure is to provide a transparent conductive film capable of maintaining transparency while preventing diffused reflection of light on the surface of the metal nanowire.
  • Still another object of the present disclosure is to provide an information input device capable of preventing black floating caused by diffused reflection of light by using such a transparent conductive film as an electrode, and further to provide an electronic device capable of displaying with good contrast.
  • the transparent conductive film according to the present disclosure in order to achieve the above objects is characterized by including metal nanowires and a colored compound adsorbed by the metal nanowires.
  • a transparent conductive film diffused reflection of light on a surface of each of the metal nanowires is prevented by the fact that visible light is absorbed by the colored compound adsorbed by the metal nanowires.
  • the colored compound is adsorbed by the metal nanowires, reduction of transparency caused by addition of the colored compound can be suppressed.
  • the transparent conductive film according to the present disclosure is also characterized by including metal nanowires each having a surface and a colored compound coating at least part of the surface.
  • metal nanowires each having a surface and a colored compound coating at least part of the surface.
  • diffused reflection of light on the surface of the metal nanowire is prevented by the fact that visible light is absorbed by the colored compound coating at least part of the surface of the metal nanowire.
  • the colored compound is unevenly distributed on the surface of the metal nanowire, reduction of transparency caused by addition of the colored compound can be suppressed.
  • the information input device also has a structure in which the transparent conductive film configured by including the metal nanowires allowed to adsorb the colored compound is provided on a transparent substrate.
  • black floating of the transparent conductive film is prevented by using the transparent conductive film in which diffused reflection of light on the surface of the metal nanowires is prevented as described above.
  • the electronic device has a structure in which the transparent conductive film configured by including the metal nanowires allowed to adsorb the colored compound is provided on a display surface side of a display panel.
  • black floating of the transparent conductive film is prevented by using the transparent conductive film in which diffused reflection of light on the surface of the metal nanowire is prevented as described above, thereby enabling high contrast display.
  • Fig. 1 is a cross-sectional schematic view for illustrating a structure of a transparent conductive film.
  • a transparent conductive film 1 according to a first embodiment is configured by accumulating metal nanowires 13 on, for example, a transparent substrate 11, and is characterized in that the metal nanowires 13 are allowed to adsorb a colored compound a.
  • the metal nanowires 13 are dispersed in a transparent resin material 15 to form an adsorption wire layer (transparent conductive film) 17, and the adsorption wire layer 17 is provided on the transparent substrate 11, thereby forming a structure in which the metal nanowires 13 are cumulated on the transparent substrate 11.
  • adsorption wire layer transparent conductive film
  • the transparent substrate 11 is composed of a material having transmittance to visible light, for example, an inorganic material or a plastic material. Such a transparent substrate 11 has a film thickness required for the transparent conductive film 1.
  • the transparent substrate 11 may have a film (sheet) shape in which the transparent substrate 11 is thinned such that flexible bending can be realized, or a substrate shape having such a film thickness that appropriate bending and rigidity can be realized.
  • Examples of an inorganic material constituting the transparent substrate 11 include quartz, sapphire, and glass.
  • a plastic material constituting the transparent substrate 11 for example, a publicly-known polymeric material can be used.
  • the publicly-known polymeric material includes triacetyl cellulose (TAC), polyester (TPEE), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide (PI), polyamide (PA), aramid, polyethylene (PE), polyacrylate, polyethersulfone, polysulfone, polypropylene (PP), diacetyl cellulose, polyvinyl chloride, acrylic resins (PMMA), polycarbonate (PC), epoxy resins, urea resins, urethane resins, melamine resins, and cycloolefin polymers (COP).
  • TAC triacetyl cellulose
  • TPEE polyethylene terephthalate
  • PEN polyethylene naphthalate
  • PA polyimide
  • PA polyamide
  • PA polyamide
  • PE polyacrylate
  • PMMA acrylic resins
  • PC polycarbonate
  • epoxy resins
  • At least part of the surface of the metal nanowire 13 is coated with the colored compound a. Accordingly, visible light is absorbed by the colored compound coating the at least part of the surface of the metal nanowire, thereby preventing diffused reflection of light on the surface of the metal nanowire.
  • the metal nanowire 13 is structured by using a metal, and is a fine wire having a diameter of the order of nm.
  • a metal nanowire 13 is composed of one or more elements selected from Ag, Au, Ni, Cu, Pd, Pt, Rh, Ir, Ru, Os, Fe, Co, and Sn as a constituent element.
  • a preferred shape of the metal nanowire 13 is configured such that the average minor axis diameter is longer than 1 nm and equal to or shorter than 500 nm, and that the average major axis length is longer than 1 ⁇ m and equal to or shorter than 1000 ⁇ m.
  • the average minor axis diameter is equal to or shorter than 1 nm, electrical conductivity of the metal nanowires 13 deteriorates, so that the metal nanowires 13 are difficult to function as a conductive film after coated.
  • the average minor axis diameter is longer than 500 nm, total light transmittance of the transparent conductive film 1 deteriorates.
  • the metal nanowires When the average major axis length is equal to or shorter than 1 ⁇ m, the metal nanowires are difficult to be linked to each other, and the transparent conductive film 1 is difficult to function as a conductive film.
  • the average major axis length is longer than 1000 ⁇ m, total light transmittance of the transparent conductive film 1 deteriorates, and at the same time, dispersibility of the metal nanowires 13 in a dispersion liquid used for forming the transparent conductive film 1 tends to deteriorate.
  • the metal nanowire 13 may have a wire shape in which metal nanoparticles are linked to each other in a beaded manner. In this case, the length is not limited.
  • the coating weight of such metal nanowires 13 is preferably 0.001 to 1.000 [g/m 2 ].
  • the coating weight is less than 0.001 [g/m 2 ]
  • the metal nanowires 13 are not sufficiently present in the adsorption wire layer 17, and conductivity of the transparent conductive film 1 deteriorates.
  • a larger coating weight of the metal nanowires 13 decreases the sheet resistance value.
  • total light transmittance of the transparent conductive film 1 deteriorates.
  • the transparent resin material 15 is a so-called binder material, used for dispersing the metal nanowires 13.
  • the transparent resin material 15 used herein can be variously selected from known transparent natural polymeric resins or synthetic polymeric resins, and may be thermoplastic resins, or thermosetting resins or photocurable resins.
  • the thermoplastic resins include polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, poly(methyl methacrylate), cellulose nitrate, chlorinated polyethylene, chlorinated polypropylene, vinylidene fluoride, ethyl cellulose, and hydroxypropyl methyl cellulose.
  • a surfactant a viscosity adjusting agent, a dispersant, a cure promoting catalyst, and a plasticizer, as well as a stabilizer such as an antioxidant and an anti-sulfurizing agent, are added as additives to the transparent resin material 15 as necessary.
  • the colored compound a has absorption in the visible light region, and adsorbs to the metal nanowire 13.
  • the visible light region is defined as a wavelength range approximately equal to or longer than 360 nm and equal to or shorter than 830 nm.
  • the colored compound a has a chromophoric group R which has absorption in the visible light region and a functional group X which is bound to the metal constituting the metal nanowire 13, and is represented by the general formula [R-X].
  • the chromophoric group [R] includes at least one or more of an unsaturated alkyl group, an aromatic ring, a heterocyclic ring, and a metal ion.
  • Concrete examples of the chromophoric group [R] include a nitroso group, a nitro group, an azo group, a methine group, an amino group, a ketone group, a thiazolyl group, a naphthoquinone group, a stilbene derivative, an indophenol derivative, a diphenylmethane derivative, an anthraquinone derivative, a triarylmethane derivative, a diazine derivative, an indigoid derivative, a xanthene derivative, an oxazine derivative, a phthalocyanine derivative, an acridine derivative, a thiazine derivate, a sulfur atom-containing compound, and a metal ion-containing compound.
  • the chromophoric group [R] at least one or more selected from the group consisting of the above-mentioned examples of the chromophoric group and the compounds containing the same can be used.
  • at least one or more selected from the group consisting of a Cr complex, a Cu complex, an azo group, an indoline group, and a compound containing the same can be used as the chromophoric group [R].
  • Examples of the functional group [X] which is bound to the metal constituting the metal nanowire 13 include a sulfo group (including a sulfonate salt), a sulfonyl group, a sulfonamide group, a carboxylic acid group (including a carboxylate salt), an amino group, an amide group, a phosphate group (including a phosphate and a phosphate ester), a phosphino group, a silanol group, an epoxy group, an isocyanate group, a cyano group, a vinyl group, a thiol group, and a carbinol group.
  • At least one of the functional groups [X] may be present in the colored compound a.
  • a carboxylic acid group, a phosphate group, and the like are preferable as a functional group [X], and a carboxylic acid group is more preferable.
  • the functional group [X] may be an atom which can be coordinated to the metal constituting the metal nanowire 13. Examples of such an atom include N (nitrogen), S (sulfur), and 0 (oxygen). When the functional group [X] is any of these atoms, the functional group [X] may constitute part of the chromophoric group [R], and the colored compound a becomes a compound having a heterocyclic ring.
  • Examples of the above-described colored compound a include acidic dyes and direct dyes.
  • Examples of a more concrete dye include, as a dye having a sulfo group, Kayakalan BordeauxBL, Kayakalan Brown GL, Kayakalan Gray BL167, Kayakalan Yellow GL143, KayakalanBlack 2RL, Kayakalan Black BGL, Kayakalan Orange RL, Kayarus Cupro Green G, Kayarus Supra Blue MRG, and Kayarus Supra Scarlet BNL200 manufactured by Nippon Kayaku Co., Ltd.; and Lanyl Olive BG manufactured by Taoka Chemical Company, Limited.
  • Kayalon Polyester Blue 2R-SF Kayalon Microester Red AQ-LE
  • Kayalon Polyester Black ECX300 Kayalon Polyester Black ECX300
  • Kayalon Microester Blue AQ-LE manufactured by Nippon Kayaku Co., Ltd.
  • a dye having a carboxyl group a pigment for dye-sensitized solar cells is included.
  • Examples of such a pigment includes N3, N621, N712, N719, N749, N773, N790, N820, N823, N845, N886, N945, K9, K19, K23, K27, K29, K51, K60, K66, K69, K73, K77, Z235, Z316, Z907, Z907Na, Z910, Z991, CYC-B1, and HRS-1, which are each a Ru complex; and Anthocyanine, WMC234, WMC236, WMC239, WMC273, PPDCA, PTCA, BBAPDC, NKX-2311, NKX-2510, NKX-2553 (manufactured by Hayashibara Biochemical Laboratories, Incorporated), NKX-2554 (manufactured by Hayashibara Biochemical Laboratories, Incorporated), NKX-2569, NKX-2586, NKX-2587 (manufactured by Hayashibara Biochemical Labor
  • the colored compound a constituting the transparent conductive film 1 is a compound that can be adsorbed by the metal constituting the metal nanowire 13 and be dissolved in the solvent used in a manufacturing process of the transparent conductive film 1 at a predetermined concentration.
  • a compound is selected from the compounds represented by the above-mentioned formula [R-X] for each metal constituting the metal nanowire 13.
  • a dispersant may be adsorbed by the metal nanowire 13.
  • a dispersant polyvinylpyrrolidone (PVP) or an amino group-containing compound such as polyethylenimine is used.
  • dispersants to be used include a compound which can be adsorbed by a metal and has a functional group such as a sulfo group (including a sulfonate salt), a sulfonyl group, a sulfonamide group, a carboxylic acid group (including a carboxylate salt), an amide group, a phosphate group (including a phosphate and a phosphate ester), a phosphino group, a silanol group, an epoxy group, an isocyanate group, a cyano group, a vinyl group, a thiol group, and a carbinol group.
  • a sulfo group including a sulfonate salt
  • a sulfonyl group including a carboxylic acid group (including a carboxylate salt)
  • an amide group including a carboxylate salt
  • a phosphate group including a phosphate and a phosphate ester
  • These dispersants are adsorbed by the metal nanowire 13 in such an amount that conductivity of the transparent conductive film 1 does not deteriorate.
  • Additives other than a dispersant may be contained as necessary in order to improve adhesion and durability between the metal nanowires 13 or with the transparent substrate 11.
  • the colored compound a preferably coats the surface of the metal nanowire at a single-molecule level.
  • reduction of transparency to visible light can be suppressed.
  • the amount of the colored compound a to be used can be minimized.
  • the colored compound a is preferably unevenly distributed only on the surface of the metal nanowire. Thus, reduction of transparency to visible light can be suppressed. In addition, the amount of the colored compound a to be used can be minimized.
  • the reflection L value of the transparent conductive film 1 configured as above is preferably equal to or less than 8 as determined by the reflection L evaluation method described in the examples below. In this condition, a black floating phenomenon can be improved, and the transparent conductive film can be suitably applied to the use of arranging the film on a display surface side of a display panel. In this case, the reflection L value is controlled by the adsorption amount of the colored compound a by the metal nanowires 13.
  • the following effects can be exerted. That is, by adsorption of the colored compound a by the metal nanowire 13, diffused reflection of light on the surface of the metal nanowire 13 can be prevented.
  • the colored compound a has a chromophoric group R which absorbs light in the visible light region, outside light is absorbed by the colored compound a, so that an effect of preventing diffused reflection can highly be obtained.
  • the transparent conductive film 1 is configured by adsorbing the colored compound a by the metal nanowire 13, increase of the manufacturing cost can also be suppressed by using a metal material without waste.
  • the structure in which the adsorption wire layer 17 is provided on the transparent substrate 11 has been described as a transparent conductive film 1.
  • the transparent conductive film 1 may be configured such that the transparent substrate 11 is eliminated and only the adsorption wire layer 17 is provided.
  • Incident light which impinges on the surface of the metal nanowire and causes black floating to occur is basically light that does not transmit the transparent conductive film or the like.
  • the colored compound a used in the transparent conductive film 1 according to the first embodiment has a function of absorbing incident light which impinges on the surface of the metal nanowire and causes black floating to occur. For this reason, although the colored compound a is used in the transparent conductive film 1 according to the first embodiment, reduction of transparency can be suppressed.
  • Fig. 2 shows, as a modification 1 of the transparent conductive film, a structure of a transparent conductive film 1-1 in which an overcoat layer 21 is provided to the transparent conductive film according to the first embodiment.
  • the overcoat layer 21 is provided for protecting the adsorption wire layer 17 configured by using the metal nanowires 13, and arranged on the top of the adsorption wire layer 17.
  • the overcoat layer 21 has light transmittance to visible light.
  • the overcoat layer 21 is composed of a polyacryl-based resin, a polyamide-based resin, a polyester-based resin, or a cellulose-based resin.
  • the overcoat layer 21 is composed of a hydrolysis product or a dehydration-condensation product of a metal alkoxide.
  • the overcoat layer 21 has such a film thickness that light transmittance to visible light is not inhibited.
  • the overcoat layer 21 may have at least one function selected from the function group consisting of a hard coat function, an anti-glare function, an antireflection function, an anti-Newton ring function, an anti-blocking function, and the like.
  • Fig. 3 shows, as a modification 2 of the transparent conductive film, a structure of a transparent conductive film 1-2 in which an anchor layer 23 is provided to the transparent conductive film according to the first embodiment.
  • the anchor layer 23 is provided for ensuring adhesion between the adsorption wire layer 17 configured by using the metal nanowires 13 and the transparent substrate 11, and arranged between the adsorption wire layer 17 and the transparent substrate 11.
  • the anchor layer 23 has light transmittance to visible light.
  • the anchor layer 23 is composed of a polyacryl-based resin, a polyamide-based resin, a polyester-based resin, or a cellulose-based resin.
  • the anchor layer 23 is composed of a hydrolysis product or a dehydration-condensation product of a metal alkoxide.
  • the anchor layer 23 has such a film thickness that light transmittance to visible light is not inhibited.
  • the modification 2 can be combined with the modification 1.
  • the adsorption wire layer 17 configured by using the metal nanowires 13 is arranged between the anchor layer 23 and the overcoat layer 21.
  • Modification 4 Structure example of a transparent conductive film provided with a hard coat layer on one main surface of a substrate
  • Fig. 15 shows, as a modification 4 of the transparent conductive film, a structure of a transparent conductive film 1-4 in which a hard coat layer 18 is provided to the transparent conductive film according to the first embodiment.
  • the hard coat layer 18 is provided for protecting the substrate 11, and arranged on the bottom of the substrate 11.
  • the hard coat layer 18 has light transmittance to visible light.
  • the hard coat layer 18 is composed of an organic hard coat agent, an inorganic hard coat agent, an organic-inorganic hard coat agent, or the like. Furthermore, the hard coat layer 18 has such a film thickness that light transmittance to visible light is not inhibited.
  • the modification 4 can be combined with at least one of the modifications 1 to 3.
  • the overcoat layer or the anchor layer may be further provided.
  • the anchor layer may be arranged, for example, at least between the substrate 11 and the adsorption wire layer 17 and/or between the substrate 11 and the hard coat layer 18.
  • the overcoat layer may be arranged, for example, on at least one of the top of the adsorption wire layer 17 and the top of the hard coat layer 18.
  • Fig. 16 shows, as a modification 5 of the transparent conductive film, a structure of a transparent conductive film 1-5 in which hard coat layers 18 and 19 are provided to the transparent conductive film according to the first embodiment.
  • the hard coat layer 18 is provided for protecting the substrate 11, and arranged on the bottom of the substrate 11.
  • the hard coat layer 19 is provided for protecting the substrate 11, and arranged on the top of the substrate 11.
  • the adsorption wire layer 17 is arranged on the top of the hard coat layer 19.
  • the hard coat layers 18 and 19 have light transmittance to visible light.
  • the hard coat layers 18 and 19 each are composed of an organic hard coat agent, an inorganic hard coat agent, an organic-inorganic hard coat agent, or the like. Furthermore, the hard coat layers 18 and 19 have such a film thickness that light transmittance to visible light is not inhibited.
  • the modification 5 can be combined with at least one of the modification 1 to 3.
  • the overcoat layer or the anchor layer may be further provided.
  • the anchor layer is arranged, for example, at at least one of a position between the substrate 11 and the hard coat layer 19, a position between the hard coat layer 19 and the adsorption wire layer 17, and a position between the substrate 11 and the hard coat layer 18.
  • the overcoat layer is arranged, for example, on at least one of the top of the adsorption wire layer 17 and the top of the hard coat layer 18.
  • a method of performing an adsorption treatment of a colored compound after the formation of a dispersion film of metal nanowires will be described as a first example of the manufacturing method of a transparent conductive film.
  • a dispersion liquid in which metal nanowires are dispersed in a solvent is prepared.
  • a transparent resin material being a binder
  • a dispersant for improving dispersibility of the metal nanowires and other additives for improving adhesion and durability are mixed in the mixture.
  • agitation As a dispersion method, agitation, ultrasonic dispersion, bead dispersion, kneading, homogenizer treatment, and the like can be preferably applied.
  • the amount of the metal nanowires to be mixed in the dispersion liquid is 0.01 to 10.00 parts by weight.
  • the amount is less than 0.01 parts by weight, a sufficient coating weight (0.001 to 1.000 [g/m 2 ]) of the metal nanowires cannot be obtained in the resulting transparent conductive film.
  • the amount is more than 10 parts by weight, the dispersibility of the metal nanowires tends to deteriorate.
  • the amount to be added is preferably determined such that conductivity of the resulting transparent conductive film does not deteriorate.
  • a solvent in which the metal nanowires can be dispersed is used.
  • a solvent in which the metal nanowires can be dispersed is used.
  • alcohol for example, methanol, ethanol, n-propanol, i-propanol, n-butanol, i-butanol, sec-butanol, tert-butanol
  • anone for example, cyclohexanone, cyclopent
  • a high boiling point solvent can be further added in the dispersion liquid to control the speed of the solvent to evaporate from the dispersion liquid.
  • the high boiling point solvent include butyl cellosolve, diacetone alcohol, butyl triglycol, propylene glycol methyl ether, propylene glycol monoethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monoisopropyl ether, diethylene glycol monobutyl ether, diethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol diethyl ether, dipropylene glycol monomethyl ether, tripropylene glycol monomethyl ether, propylene glycol monobutyl ether, propylene glycol isopropyl ether, dipropylene glycol isopropyl ether, tripropylene glycol is
  • a dispersion film 17a in which the metal nanowires 13 are dispersed is formed on a transparent substrate 11.
  • a method of forming the dispersion film 17a is not limited, but a wet film forming method is preferable in view of physical properties, convenience, manufacturing cost, and the like.
  • a wet film forming method a known method such as a coating method, a spraying method, or a printing method is applied.
  • the coating method is not particularly limited, and a known coating method can be used.
  • Examples of a known coating method include a micro-gravure coating method, a wire bar coating method, a direct gravure coating method, a die coating method, a dipping method, a spray coating method, a reverse roll coating method, a curtain coating method, a comma coating method, a knife coating method, and a spin coating method.
  • Examples of a printing method include letterpress, offset, gravure, intaglio, rubber plate, screen, and ink-jet printings.
  • the dispersion film 17a in which the metal nanowires 13 are dispersed in the solvent containing an uncured transparent resin material (being a binder) 15a is formed.
  • the solvent in the dispersion film 17a formed on the transparent substrate 11 is dried and then removed. Removal of the solvent by drying may be performed by natural drying or heat drying. Thereafter, a curing treatment of an uncured transparent resin material (15a) is performed, so that the metal nanowires 13 are dispersed in a cured transparent resin material 15. Thereafter, to reduce the sheet resistance value of the obtained transparent conductive film, a pressurizing treatment with a calendar is performed as necessary.
  • a treatment solution containing a colored compound is prepared.
  • a treatment solution is prepared by, for example, dissolving a colored compound in a solvent.
  • the concentration of the colored compound in the treatment solution is preferably high, in order to improve the adsorption rate of the colored compound by the metal nanowires in the adsorption treatment using the treatment solution.
  • the concentration of the colored compound in the treatment solution is preferably equal to or more than 0.01% by weight.
  • the liquid colored compound may be used as a treatment solution as it is.
  • the solvent used for preparing the treatment solution may be appropriately selected such that the colored compound can be dissolved at a predetermined concentration.
  • a solvent include water, acetonitrile, 3-methoxypropionitrile, 3,3-dimethoxypropionitrile, ethoxypropionitrile, 3-ethoxypropionitrile, 3,3'-oxydipropionitrile, 3-aminopropionitrile, propionitrile, cyanoacetic acid propyl, 3-methoxypropyl isothiocyanate, 3-phenoxypropionitrile, p-anisidine 3-(phenylmethoxy)propanenitrile, methanol, ethanol, propanol, isopropyl alcohol, n-butanol, 2-butanol, isobutanol, t-butanol, ethylene glycol, triethylene glycol, 1-methoxy-ethanol, 1,1-dimetyl-2-methoxyethanol, 3-methoxy-1-propano
  • the dispersion film 17a in which the metal nanowires 13 are dispersed in the cured transparent resin material 15, is contacted with a treatment solution 25 in which the colored compound a is dissolved.
  • the colored compound a in the treatment solution 25 is adsorbed by the metal nanowires 13 in the dispersion film 17a, thereby to form an adsorption wire layer 17.
  • the colored compound a in the treatment solution 25 and the metal material constituting the metal nanowire 13 are allowed to be bound by covalent bonding or coordination bonding.
  • a concrete example of the adsorption treatment includes an immersion method in which the dispersion film 17a including the metal nanowires 13 dispersed therein is immersed in the treatment solution 25, or a coating method or a printing method in which a liquid film of the treatment solution 25 is formed on the dispersion film 17a.
  • the treatment solution 25 is prepared in an amount that allows the dispersion film 17a to be sufficiently immersed, and the dispersion film 17a is immersed in the treatment solution 25 for 0.1 seconds to 48 hours. Meanwhile, by performing at least one of heat and ultrasonic treatments, the adsorption rate of the colored compound a to the metal nanowires 13 can be increased. Following the immersion, the dispersion film 17a is washed with a good solvent of the colored compound as necessary, and a process of removing the non-adsorbed colored compound that is left in the dispersion film 17a is performed.
  • an appropriate method is selected from, for example, a micro-gravure coating method, a wire bar coating method, a direct gravure coating method, a die coating method, a dipping method, a spray coating method, a reverse roll coating method, a curtain coating method, a comma coating method, a knife coating method, and a spin coating method, to form a liquid film of the treatment solution 25 on the dispersion film 17a.
  • an appropriate method is selected from, for example, a letterpress printing method, an offset printing method, a gravure printing method, an intaglio printing method, a rubber plate printing method, an ink-jet method, and a screen printing method, to form a liquid film of the treatment solution 25 on the dispersion film 17a.
  • the coating method or the printing method when the coating method or the printing method is applied, by performing at least one of heat and ultrasonic treatments in a state in which a certain amount of liquid film of the treatment solution 25 is formed on the dispersion film 17a, the adsorption rate of the colored compound a by the metal nanowires 13 can be increased.
  • the dispersion film 17a is washed with a good solvent of the colored compound a as necessary, and a process of removing the non-adsorbed colored compound that is left in the dispersion film 17a is performed.
  • formation of a certain amount of liquid film of the treatment solution 25 does not need to be achieved by performing liquid film formation once.
  • the formation may be achieved by repeating the forming process and the washing process described above more than once.
  • a drying treatment of the adsorption wire layer 17 is performed.
  • This drying treatment may be performed by natural drying, or by heat drying in a heating device.
  • the manufacturing of a transparent conductive film 1 provided with the adsorption wire layer 17 on the transparent substrate 11 is completed.
  • a previously patterned dispersion film 17a may be formed in the process of forming the dispersion film 17a described with reference to Fig. 5A .
  • Pattern formation of the dispersion film 17a may be conducted by, for example, a printing method.
  • the dispersion film 17a or the adsorption wire layer 17 is subjected to pattern etching in a process after the dispersion film 17a formed in Fig. 5A has been cured.
  • the pattern etching may be performed at least so that the metal nanowires 13 are divided and put in an insulated state, in a region other than an electrode pattern in the dispersion film 17a or the adsorption wire layer 17.
  • the overcoat layer 21 is provided on the top of the adsorption wire layer 17, as in the modification 1 described with reference to Fig. 2
  • a process of further forming the overcoat layer 21 on the top of the adsorption wire layer 17 may be performed.
  • the anchor layer 23 is formed on the transparent substrate 11 prior to the formation of the dispersion film 17a. Thereafter, a process of forming the dispersion film 17a on the anchor layer 23 and the subsequent process thereto may be performed.
  • a method of forming a dispersion film of metal nanowires after a colored compound is adsorbed by the metal nanowires will be described as a second example of the manufacturing method of a transparent conductive film.
  • the redundant description on the procedure similar to that according to the second embodiment described with reference to Fig. 5 is omitted.
  • a dispersion liquid in which metal nanowires are dispersed in a solvent is prepared.
  • the dispersion liquid prepared here is different from the dispersion liquid prepared in the first example in that the colored compound is added.
  • a structure other than this is similar to that in the first example.
  • the amount of the colored compound to be added in the dispersion liquid is preferably large in order to increase an effect of reducing the reflection L value.
  • the amount of the colored compound to be added in the dispersion liquid is preferably 0.0001 to 0.1% by weight.
  • a dispersion film 17b is formed on a transparent substrate 11, with the dispersion liquid containing the colored compound a prepared as described above.
  • This dispersion film 17b is a film which includes the metal nanowires 13 allowed to adsorb the colored compound a and dispersed in the solvent, and which also contains an uncured transparent resin material 15a.
  • a method of forming the dispersion film 17b is not limited, and an immersion method or a coating method similar to the method according to the first example described with reference to Fig. 5 is applied.
  • the solvent in the dispersion film 17b formed on the transparent substrate 11 is dried and then removed. Thereafter, a curing treatment of an uncured transparent resin material (15a) is performed, thereby forming an adsorption wire layer 17 in which the metal nanowires 13 allowed to adsorb the colored compound a are dispersed in a cured transparent resin material 15.
  • the removal of the solvent by drying, and the curing treatment of the uncured transparent resin material described above are performed by a method similar to that described in the first example.
  • a pressurizing treatment with a calendar is performed as necessary, in a manner similar to the first example.
  • the previously patterned dispersion film 17b may be formed in the process of forming the dispersion film 17b described with reference to Fig. 6A .
  • Pattern formation of the dispersion film 17b may be performed by, for example, a printing method.
  • the dispersion film 17b (adsorption wire layer 17) may be subjected to pattern etching in a process after the dispersion film 17b formed in Fig. 6A has been cured. In this case, the pattern etching may be performed at least so that the metal nanowires 13 are divided and put in an insulated state, in a region other than an electrode pattern in the dispersion film 17b (adsorption wire layer 17).
  • the transparent conductive film 1-1 in which the overcoat layer 21 is provided on the top of the adsorption wire layer 17, as in the modification 1 described with reference to Fig. 2 a process of further forming the overcoat layer 21 on the top of the adsorption wire layer 17 may be performed.
  • the anchor layer 23 is formed on the transparent substrate 11 prior to the formation of the dispersion film 17b. Thereafter, a process of forming the dispersion film 17b on the anchor layer 23 and the subsequent process thereto may be performed.
  • the transparent conductive film 1 having a structure in which the colored compound a is adsorbed to the metal nanowires 13 themselves can be manufactured at low cost by a simple method without using a vacuum process, in a manner similar to the manufacturing method according to the second embodiment. Furthermore, particularly in the manufacturing method according to the present third embodiment, the manufacturing procedures are fewer as compared to those in the manufacturing method according to the second embodiment, and the transparent conductive film 1 can be obtained more simply.
  • Fig.7 shows a main part structural view of an information input device using transparent conductive films.
  • the information input device 31 shown in this drawing is, for example, a capacitive touch panel arranged on a display surface of a display panel, and configured by using two transparent conductive films 1x and 1y.
  • the transparent conductive films 1x and 1y includes electrode patterns 17x1, 17x2, ... and 17y1, 17y2, ... arranged in parallel on the respective transparent substrates 11, respectively.
  • the electrode patterns each include the adsorption wire layer described in the first embodiment and the modifications 1 to 3.
  • These transparent conductive films 1x and 1y are bonded together via an adhesive insulating film 33 so that the electrode patterns 17x1, 17x2, ... and the electrode patterns 17y1, 17y2, ... are opposed to each other in a state of being orthogonal to each other in the x-y direction.
  • this information input device 31 includes a plurality of terminals wired thereto.
  • the terminals separately apply a measurement voltage to each of the electrode patterns 17x1, 17x2, ... and 17y1, 17y2, ... of the transparent conductive films 1x and 1y.
  • the information input device 31 alternately applies a measurement voltage to the electrode patterns 17x1, 17x2, ... provided to the transparent conductive film 1x and the electrode patterns 17y1, 17y2, ... provided to the transparent conductive film 1y.
  • the capacity of each part existing in the information input device 31 changes.
  • the measurement voltage of each of the electrode patterns 17x1, 17x2, ... and 17y1, 17y2, ... changes. This change varies depending on the distance from the position contacted by a finger or a touch pen, and is largest at the position contacted by a finger or a touch pen. For this reason, the position addressed by the electrode patterns 17xn and 17yn, in which the change of the measurement voltage becomes largest, is detected as a position touched by a finger or a touch pen.
  • the adsorption wire layers 17 and 17' inhibiting diffused reflection of light are used as electrode patterns 17x1, 17x2, ... and 17y1, 17y2, .... Accordingly, the patterned electrode patterns 17x1, 17x2, ... and 17y1, 17y2, ... can be prevented from being visually recognized by diffused reflection of outside light. Furthermore, when the information input device 31 is arranged on the display surface of the display panel, a display in which black floating in a black display state is prevented is enabled. The black floating is caused by diffused reflection of outside light on the electrode patterns 17x1, 17x2, ... and 17y1, 17y2, ... provided in the information input device 31.
  • the information input device according to the present disclosure is not limited to the information input device 31 described herein, and can be widely applied to an information input device configured by including the transparent conductive film.
  • the information input device may be a resistive touch panel. Even with such a structure, the effects similar to those of the information input device 31 according to the fourth embodiment can be obtained.
  • Fig. 8 shows a perspective view of a display device including an information input device, as an example of the electronic device of the present disclosure.
  • the display device 41 shown in this drawing includes, for example, the information input device 31 configured as described in the fourth embodiment arranged on a display surface of a display panel 43.
  • the display panel 43 is, for example, a liquid crystal display panel which may be any of a reflection type, a transmission type, and a semi-transmission and reflection type.
  • a deflecting plate is provided at least on the display surface side.
  • a flexible printed circuit board 45 is connected to this display panel 43, so that a signal of a display image is input.
  • the information input device 31 is arranged in an overlapping manner on the display surface for an image in the display panel 43 in a state of covering the display surface.
  • a flexible printed circuit board 35 is connected to this information input device 31.
  • the above-mentioned measurement voltage is applied to each of the electrode patterns 17x1, 17x2, ... and 17y1, 17y2, ... in the information input device 31 from the flexible printed circuit board 35.
  • a user can contact a part of the display image displayed in the display panel 43 with a finger or a touch pen, so that the positional information of the contacted portion can be input to the information input device 31.
  • the display device 41 according to the fifth embodiment described above includes the information input device 31 configured as described in the fourth embodiment and arranged on the display surface of the display panel 3. Therefore, even if the display of the display panel 43 is a black display, black floating caused by diffused reflection of outside light on the surfaces of the electrode patterns 17x1, 17x2, ... and 17y1, 17y2, ... constituting the information input device 31 is prevented, and a high contrast display is made possible even with the information input device 31.
  • the display panel 43 is exemplified by a liquid crystal display panel.
  • the display panel 43 is not limited to this. Almost all display panels, such as an organic EL display device and a plasma display panel, can be applied, and exert the similar effects.
  • Fig. 9 shows a main part cross-sectional view of a display device using a transparent conductive film.
  • a display device 51 shown in this drawing is an active matrix-type organic EL display device using an organic electroluminescent element EL.
  • the display device 51 is an active matrix-type display device 51 in which a pixel circuit using a thin film transistor Tr and an organic electroluminescent element EL connected to the pixel circuit are arranged in each pixel P on a substrate 50.
  • the top of the substrate 50 on which the thin film transistors Tr are arranged is covered with a planarization insulating film 53.
  • a pixel electrode 55 connected to the thin film transistor Tr via a connection pore provided in the planarization insulating film 53 is arranged and formed.
  • the pixel electrode 55 constitutes a positive electrode (or a negative electrode).
  • each pixel electrode 55 The peripheral border of each pixel electrode 55 is covered with a window insulating film 57, thereby being element-separated.
  • the top of the element-separated pixel electrode 55 is covered with an organic luminescence function layer of each color 59r, 59g, or 59b.
  • a common electrode 61 covering these organic luminescence function layers is provided.
  • Each organic luminescence function layer 59r, 59g, or 59b has a layered structure having at least an organic luminescent layer.
  • a layer, which contacts each organic luminescent function layer 59r, 59g, or 59b, in the common electrode 61 covering the organic luminescence function layers, is formed as, for example, a negative electrode (or a positive electrode).
  • the common electrode 61 is formed, as a whole, as a light transmitting electrode which takes out the luminescent light generated in each of the organic luminescent function layers 59r, 59g, and 59b.
  • a transparent electrode including the adsorption wire layers 17 and 17' described in the first embodiment and the modifications 1 to 3 thereof is used in at least part of the layers of the common electrode 61.
  • the organic electroluminescent element EL is formed in each pixel P part in which the organic luminescence function layer 59r, 59g, or 59b is arranged between the pixel electrode 55 and the common electrode 61.
  • a protective layer is further provided on the substrate 50 on which these organic electroluminescent elements EL are formed, and a sealing substrate is bonded on the protective layer via an adhesive agent, thereby constituting the display device 51.
  • the adsorption wire layers (transparent electrode films) 17 and 17' described in the first embodiment and the modifications 1 to 3 thereof are used as a common electrode 61 provided on the display surface side that is a side of taking out the luminescent light.
  • a common electrode 61 provided on the display surface side that is a side of taking out the luminescent light.
  • the information input device 31 may be arranged on the display surface side of this display device 51 similarly to the fifth embodiment. Even in this case, the effects similar to those in the fifth embodiment can be obtained.
  • Figs. 10 to 14 each show an example of an electronic device which has, in its display part, the display device provided with the information input device according to the fifth embodiment described with reference to Fig. 8 or the display device according to the sixth embodiment described with reference to Fig. 9 .
  • Application examples of the electronic device according to the present disclosure will be described below.
  • FIG. 10 is a perspective view showing a TV set to which the present disclosure is applied.
  • a TV set 100 according to the present application example includes a display part 101 having a front panel 102, a filter glass 103, and the like. As the display part 101, the display device previously described is applied.
  • Fig. 11 is a view showing a digital camera to which the present disclosure is applied.
  • Fig. 11A is a perspective view seen from the front side
  • Fig. 11B is a perspective view seen from the back side.
  • a digital camera 110 according to the present application example includes a luminescence part 111 for flash, a display part 112, a menu switch 113, a shutter button 114, and the like. As the display part 112, the display device previously described is applied.
  • FIG. 12 is a perspective view showing a notebook personal computer to which the present disclosure is applied.
  • a notebook personal computer 120 according to the present application example includes a keyboard 122 that is operated when inputting a letter or the like, a display part 123 that displays an image, and the like in a body 121. As the display part 123, the display device previously described is applied.
  • FIG. 13 is a perspective view showing a video camera to which the present disclosure is applied.
  • a video camera 130 according to the present application example includes a body part 131, a lens 132 for subject photography and provided on the side facing the front, a start/stop switch 133 for taking pictures, a display part 134, and the like.
  • the display part 134 the display device previously described is applied.
  • FIG. 14 is a front view showing a mobile terminal device, for example, a mobile phone, to which the present disclosure is applied.
  • a mobile phone 140 according to the present application example includes an upper side casing 141, a lower side casing 142, a linking part (a hinge part in this case) 143, and a display part 144.
  • the display part 144 the display device previously described is applied.
  • the transparent conductive films of Examples 1 to 4 were prepared as below (see Table 1 shown below).
  • silver nanowires were prepared as metal nanowires.
  • silver nanowires each having a diameter of 30 nm and a length of 10 ⁇ m [Ag(1) in Table 1] were prepared.
  • the prepared dispersion liquid was coated on a transparent substrate using a count 8 coil bar to form a dispersion film.
  • the coating weight of the silver nanowires was about 0.05 g/m 2 .
  • a transparent substrate a PET (O300E manufactured by Mitsubishi Plastics Inc.) having a thickness of 125 ⁇ m was used.
  • a heating treatment at 85°C for 2 minutes was performed in the atmosphere to dry and remove the solvent in the dispersion film.
  • a heating treatment at 150°C for 30 minutes was further performed in the atmosphere to cure the transparent resin material in the dispersion film.
  • a black dye (Kayakalan Black 2RL manufactured by Nippon Kayaku Co., Ltd.) as a colored compound was dissolved in dimethyl sulfoxide at 0.25% by weight, thereby preparing a treatment solution containing a colored compound.
  • the dispersion film of the silver nanowires was immersed in the treatment solution of the colored compound heated to 85°C, and an adsorption treatment for adsorbing the colored compound in the treatment solution to the silver nanowires in the dispersion film was performed.
  • the adsorption treatment time (immersion time) was set at 10 minutes in Example 1, at 7.5 minutes in Example 2, at 5.0 minutes in Example 3, and at 2.5 minutes in Example 4.
  • the colored compound has a sulfo group as a functional group [X] .
  • a transparent conductive film was prepared in the procedure similar to the procedures according to Examples 1 to 4 described above, except that a black dye (Kayakalan Black BGL manufactured by Nippon Kayaku Co., Ltd.) was used as a colored compound and that the adsorption treatment time (immersion time) was set at 2 minutes.
  • this colored compound has a sulfo group as a functional group [X.
  • a transparent conductive film was prepared in a procedure similar to the procedures according to Examples 1 to 4 described above, except that a compound of each color was used as a colored compound and that the adsorption treatment time (immersion time) was set at 10 minutes.
  • each of these compounds of each color has a sulfo group as a functional group [X] .
  • a transparent conductive film was prepared in a procedure similar to the procedures according to Examples 1 to 4, except that an IPA dispersion liquid of silver nanowires (trade name: SLV-NW-60, 60 nm in diameter) manufactured by Blue Nano Inc. as metal nanowires was used and that the adsorption treatment time (immersion time) was set at 10 minutes.
  • an IPA dispersion liquid of silver nanowires (trade name: SLV-NW-60, 60 nm in diameter) manufactured by Blue Nano Inc. as metal nanowires was used and that the adsorption treatment time (immersion time) was set at 10 minutes.
  • a dispersion liquid containing a colored compound together with the silver nanowires [Ag(2)] was prepared.
  • the composition of the dispersion liquid is as follows.
  • the prepared dispersion liquid was coated on a transparent substrate using a count 8 coil bar to form a dispersion film.
  • the coating weight of the silver nanowires was about 0.05 g/m 2 .
  • a transparent substrate As a transparent substrate, a PET (O300E manufactured by Mitsubishi Plastics Inc.) having a thickness of 125 ⁇ m was used.
  • a heating treatment at 85°C for 2 minutes in the atmosphere was performed to dry and remove the solvent in the dispersion film. Accordingly, a transparent conductive film, in which the silver nanowires allowed to adsorb the colored compound were cumulated on the transparent substrate without being dispersed in a transparent resin material, was prepared.
  • a transparent conductive film was prepared in a procedure similar to the procedures according to Examples 1 to 4 described above, except that a compound having a carboxyl group (D358 manufactured by Mitsubishi Paper Mills, Ltd.) was used as a colored compound and that the adsorption treatment time (immersion time) was set at 20 minutes.
  • a compound having a carboxyl group D358 manufactured by Mitsubishi Paper Mills, Ltd.
  • immersion time was set at 20 minutes.
  • a transparent conductive film was prepared in a procedure similar to the procedures according to Examples 1 to 4 described above, except that a colorless dodecylbenzenesulfonic acid (DBS: functional group - sulfo group) was used in place of a colored compound and that the adsorption treatment time (immersion time) was set at 10 minutes.
  • DBS colorless dodecylbenzenesulfonic acid
  • Example 2 A procedure similar to that according to Example 1 was performed until a transparent resin material in a dispersion film was cured, and an adsorption treatment was not performed. Thus, a transparent conductive film without containing a colored compound was prepared.
  • Example 10 A procedure similar to that according to Example 10 was performed until a transparent resin material in a dispersion film was cured, and an adsorption treatment was not performed. Thus, a transparent conductive film without containing a colored compound was prepared.
  • a transparent conductive film was prepared in a procedure similar to the procedures according to Examples 1 to 4 described above, except that a colorless dodecanoic acid (DA: functional group - carboxyl group) was used in place of a colored compound and that the adsorption treatment time (immersion time) was set at 10 minutes.
  • DA colorless dodecanoic acid
  • a transparent conductive film was prepared in a procedure similar to the procedures according to Examples 1 to 4 described above, except that a colorless dodecylphosphonic acid (DPA: functional group - phosphate group) was used in place of a colored compound and that the adsorption treatment time (immersion time) was set at 10 minutes.
  • DPA colorless dodecylphosphonic acid
  • HM-150 (trade name; manufactured by Murakami Color Research Laboratory) in accordance with JIS K7136.
  • Comparative Example 2 is comparable to the untreated part of Examples 1 to 9; and Comparative Example 3 is comparable to the untreated part of Example 10. That is, the three level evaluation with respect to Examples 1 to 9 and 12 and Comparative Examples 1, 2, 4, and 5 are based on Comparative Example 2; and the three level evaluation with respect to Examples 10 and 11 are based on Comparative Example 3.
  • a reflection L value was evaluated with the samples used in evaluating black floating, in accordance with JIS Z8722 using Color i5 manufactured by X-Rite, Incorporated.
  • the color of the colored compound is not limited.
  • the adsorption treatment time is preferably set in an appropriate manner for each colored compound.
  • Example 11 the high reduction effect of black floating was obtained even in Example 11 in which the dispersion film was formed after the silver nanowires were allowed to adsorb the colored compound by initial mixing.
  • the procedure of adsorbing the colored compound to the silver nanowires is not limited.
  • Example 12 and Comparative Example 4 it was confirmed that sheet resistance does not increase.
  • Comparative Example 5 increase of the sheet resistance was suppressed to be low.
  • a sheet resistance value can be lowered by selecting the kind of the functional group [X]. It is considered that this is because the adsorption form of the colored compound to the surface of the silver nanowire varies depending on the kind of the functional group [X]. Therefore, in order to inhibit the increase in the sheet resistance, the functional group [X] is preferably a carboxyl group and a phosphate group, and particularly preferably a carboxyl group.
  • the colored compound preferably has, as a chromophoric group [R], a Cr complex, a Cu complex, an azo group, an indoline group, and a compound containing the same.
  • Example 1 An environmental test was performed in which the transparent conductive film prepared in Example 1 was stored for a certain period in a dry atmosphere at 85°C and in a 90% humidity atmosphere at 60°C, to evaluate whether B) black floating and C) sheet resistance value ( ⁇ / €) of the transparent conductive film after the test have changed or not.

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Claims (9)

  1. Une pellicule conductrice transparente (1), comprenant :
    des nanofils métalliques (13) ; et
    un composé coloré (a) qui absorbe de la lumière dans une région de lumière visible,
    sachant que les nanofils métalliques (13) sont dispersés dans un matériau de résine transparent,
    caractérisée en ce que
    le composé coloré (a) est adsorbé par les nanofils métalliques (13).
  2. La pellicule conductrice transparente (1) d'après la revendication 1, sachant que le composé coloré (a) présente un groupement fonctionnel qui est lié à un métal constituant les nanofils métalliques (13).
  3. La pellicule conductrice transparente (1) d'après la revendication 1 ou 2, sachant que le composé coloré (a) présente un groupement chromophore, qui absorbe de la lumière dans une région de lumière visible, et un groupe qui est lié à un métal constituant les nanofils métalliques (13).
  4. La pellicule conductrice transparente (1) d'après la revendication 1 ou 2, sachant que le composé coloré (a) est représenté par la formule générale suivante (1),

            R-X ...     (1)

    où R est un groupement chromophore, qui absorbe de la lumière dans une région de lumière visible, et X est un groupement qui est lié à un métal constituant les nanofils métalliques (13).
  5. La pellicule conductrice transparente (1) d'après la revendication 1 ou 2, sachant qu'une valeur de réflexion L comporte 8 ou moins, déterminée conformément au JIS Z8722.
  6. La pellicule conductrice transparente (1) d'après la revendication 1 ou 2, sachant que les nanofils métalliques (13) sont cumulés sur une face supérieure (top) d'un substrat transparent (11).
  7. Un liquide de dispersion, comprenant :
    des nanofils métalliques (13) ;
    un composé coloré (a) qui absorbe de la lumière dans une région de lumière visible et
    un matériau de résine transparent non durci,
    caractérisé en ce que
    le composé coloré (a) est adsorbé par les nanofils métalliques (13).
  8. Un dispositif d'entrée d'informations (31), comprenant :
    un substrat transparent (11) ; et
    une pellicule conductrice transparente (1) d'après une quelconque des revendications de 1 à 5, sachant que la pellicule conductrice (1) est fournie sur le substrat transparent (11).
  9. Un dispositif électronique (100 ; 110 ; 120 ; 130 ; 140), comprenant :
    un panneau d'affichage (101 ; 112 ; 123 ; 134 ; 144) ; et
    une pellicule conductrice transparente (1) d'après une quelconque des revendications de 1 à 6, sachant que la pellicule conductrice (1) est fournie sur le côté surface d'affichage du panneau d'affichage (101 ; 112 ; 123 ; 134 ; 144).
EP11859528.9A 2011-02-23 2011-07-12 Film électroconducteur transparent, dispositif de saisie d'informations et appareil électronique Active EP2613328B1 (fr)

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US10196526B2 (en) 2019-02-05
JP2012190777A (ja) 2012-10-04
CN108762575A (zh) 2018-11-06
CN103493151A (zh) 2014-01-01
KR101849816B1 (ko) 2018-04-17
EP2613328A4 (fr) 2013-09-11
JP2012190780A (ja) 2012-10-04
WO2012114552A1 (fr) 2012-08-30
JP5447640B2 (ja) 2014-03-19
JP2013122053A (ja) 2013-06-20
JP5174229B2 (ja) 2013-04-03
EP2613328A1 (fr) 2013-07-10
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JP4893867B1 (ja) 2012-03-07
KR20140045317A (ko) 2014-04-16

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